Jaw-prop.



W. F. DUNLOP.

JAW PROP.

APPHCAHON FILED OCT. 13. !914.

Patented June 15, 1915.

-. dentist 7 WI LIAM r.

l Specification of Letters Patent.-

emu, or new YORK. 1v. Y.

JAW-PROP. V

Patented June 15, 1915.

Application filed October 13, 1914. Serial No. 866,493.

To all whom it may concern:

Be it known that I, WILLIAM F. DUNLOP, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Jaw-Props, of which the following is a specification.

This invention relates to jaw props and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a prop adapted to be positioned between the jaws of a patient during dental operations whereby the jaws are held in open position with relation to each other to enable the to readily perform the operation.

The prop is provided with a rubber dam clampand is also provided with an adjustable bracket upon which an illuminator is mounted the parts being so arranged that the rays of light from the illuminator may be directed upon any point within the mouth during the dental operation.

In the accompanying drawing: Figure 1 is'a perspective View of the prop illustrating the same'in position between the jaws of a patient. Fig. 2 is a top plan view of the prop. Fig. 3 is a side elevation of the same with parts in section. Fig. i is a detailed perspective view 0 a part of the bracket of the prop.

The prop comprises a block 1 which is provided at its lower end with a cushion 2 adapted to rest upon the teeth of the lower jaw of a patient when the prop is in position in the mouth. ,A block 3 is located above the block 1 and is mounted upon a screw 4 which passes through the block 3 and engages the block 1 in a manner best illustrated in Fig. 30f the drawing. The block 3 is provided at its upper end with a cushion 5 which is adapted to engage the teeth of the upper jaw of a patient when the prop is in position in the mouth. The block 1 is provided with a slot 6 which en ters the lower portion of the said block from the lower part of one side thereof and the block 1 is provided at the end of the slot 6 with outstanding lugs 7. A screw 8 is turnably mounted in one of the lugs 7 and has threaded engagement with the other lug 7 whereby the said lugs may be drawn toward each other and the said slot 6 at its outer portion may be contracted or expanded. A rubber dam clamp 9 is inserted at its intermediate portion in the slot 6 and by tightening the screw 8 the lugs 7 may be drawn toward each other whereby the said clamp is gripped and held between the opposite side walls of the slot 6.

n arm 10 is turnably mounted upon the screw 4 between the blocks 1 and 3 and the said blocks have sufficient frictional contact with the said arm to hold the same at an adjusted position but at the same time the arm 0 may be turned upon the screw A when sufficient lateral pressure is brought to bear against the said arm. A tubular arm 11 is pivotally connected with the arm 10 and slidably receives a tube section 12 upon which is mounted a socket member 13. The inner portior of the tube 12 is slit as at 14 to permit the inner part of the said tube to expand whereby it may frictionally engage the interior of the arm 11 and thus remain at a position to which it is adjusted with relation to the said arm. An electric lamp 15 is supported by the socket member 13 and current the said lamp in any suitable manner.

From the above description taken in conjunction with the accompanying drawing it will be obser rod that when the blocks 1 and 3 are positioned between the jaws of a patient the side portions of the rubber dam clamp 9 will be positioned at the opposite sides of the row of teeth and may hold a rubber dam in proper position in the mouth. Furthermore the bracket of which the arms '10 and 11 are component parts may be adjusted so that the lamp 15 may direct its rays to any particular point within the mouth of the patient.

Having described the invention what is claimed 1s:-

1. A jaw prop comprising blocks, a bracket pivotally mounted with relation to an between the blocks and frictionally held by the same and an illuminator carried by the bracket.

2. A jaw prop comprising blocks, a rubber dam clamp carried by one of the blocks, a bracket pivotally mounted with relation to and between the blocks and frictionally held wires 16 are connected with by vthe same and an illuminatorcarried by member and an illuminator carried by the the bracket. I socket memben- V 10 3. A jaw prop comprising blocks, t ne-rm In testimony whereof I affix my signature -piv0ted1to the blocks, a second arm pivoted in presence oftWo Witnesses.

5 to the first mentioned arm, a member slid- WILLIAMiF. DUNLOP."

ably mounted in the last mentioned armend Witnesses V frictionally engaging 'the same, a socket M. MACDONALD, member mounted on the last mentioned J. H. SWANsoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents r Washington, 11.0., i 

